Patents by Inventor James Walder

James Walder has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Resilient pad for keyboards
    Patent number: 4971862
    Abstract: A resilient pad for keyboards, such as computer keyboards, is disclosed. The pad is composed of EPDM blended with a copolymer of propylene oxide and allyl glycidyl ether. Each of the polymers is present in the amount of 10-90 parts. An accelerator system for the polymer blend is also disclosed. The pad has substantially improved resilience as measured by the hysteresis of the pad.
    Type: Grant
    Filed: April 14, 1989
    Date of Patent: November 20, 1990
    Assignee: Acushnet Company
    Inventors: Daniel Corbett, James Walder
  • Resilient pad for keyboards
    Patent number: 4737412
    Abstract: A resilient pad for keyboards, such as computer keyboards, is disclosed. The pad is composed of EPDM blended with a copolymer of propylene oxide and allyl glycidyl ether. Each of the polymers is present in the amount of 10-90 parts. An accelerator system for the polymer blend is also disclosed. The pad has substantially improved resilience as measured by the hysteresis of the pad.
    Type: Grant
    Filed: July 2, 1986
    Date of Patent: April 12, 1988
    Assignee: Acushnet Company
    Inventors: Daniel Corbett, James Walder